Structural, spectroscopic and magnetic study of nanocrystalline Ni–Zn ferrites

Javed

Materials Science-Poland

et al. 2017

Nanocrystalline NiFe 2 O 4 particles were prepared by conventional sol-gel, citrate-nitrate sol-gel combustion and coprecipitation methods. The synthesized samples were annealed at 1000°C for two hours and structural, chemical, morphological, optical and magnetic properties of nickel ferrite were investigated. The structural properties were investigated by X-ray diffraction (XRD) technique which confirmed the formation of single phase NiFe 2 O 4 particles derived by the three methods. The chemical properties were analyzed by Fourier transform infrared (FT-IR) spectroscopy which confirmed the corresponding vibration modes in the samples. The optical properties were studied by UV-Vis spectroscopy. The morphological study of the as-synthesized samples was carried out by scanning electron microscopy (SEM). SEM images showed the agglomerated nanoparticles of NiFe 2 O 4 . The magnetic properties were investigated by vibrating sample magnetometer (VSM), which showed that the calcined samples exhibited typical magnetic behavior.

Section: Resultssupporting

confidence: 90%

Influence of preparation method on structural, optical and magnetic properties of nickel ferrite nanoparticles

Javed

Materials Science-Poland

et al. 2017

ISRN Condensed Matter Physics

“…In the present work, the high frequency band ν a 1 and the second absorption band ν a 2 are found in the ranges 572-590 cm −1 and 382-404 cm −1 , respectively. These are attributed to tetrahedral and octahedral site complexes in spinel structure [23]. The values of ν a 1 are higher than those of ν a 2 indicating that the normal mode of vibration of the tetrahedral complexes is higher than that of the corresponding octahedral site.…”

Section: Ir Spectral Analysismentioning

confidence: 86%

Structural and Elastic Properties of Li-Ni Ferrite

Mazen

Elmosalami

2011

Li-Nickel ferrites with the chemical formula Li 0.5−0.5x Ni x Fe 2.5−0.5x O 4 (0.0 ≤ x ≤ 1.0) have been prepared by the ceramic method. The spinel structure in homogenous state was realized by X-ray diffraction analysis. The lattice parameter has been determined for each composition and found to be nearly constant over the whole range of Ni concentration (= 0.83 nm ± 0.01). The cation distribution for each composition has been suggested. The experimental and theoretical lattice constants were found to be in good agreement with each other confirming the agreeability of the suggested cation distribution. The analysis of IR spectra indicates the presence of splitting in the absorption band due to the presence of small amounts of Fe 2+ ions in the ferrite system. The force constants for tetrahedral and octahedral sites have been determined. Young's modulus (E), rigidity modulus (G), bulk modulus (B), Debye temperature (θ D ), and transverse (V t ) and longitudinal (V l ) wave velocities have been determined. The variation of elastic moduli with composition has been interpreted in terms of binding forces between the atoms of spinal lattice.

“…The average crystallite size ( D) was calculated by using Scherrer's formula [11,12]. D = (0.9 × λ)/ (β × cos θ) where, λ the wavelength of X-rays (1.5406 Ǻ), β is the full-width at half-maximum in radian and θ the angle of diffraction.…”

Section: Structure Propertiesmentioning

confidence: 99%

Study of structural and optical properties of the ferrite films prepared by chemical pyrolysis spray technique

Alyasary

Almarmade²,

Altiee

2018

J. Phys.: Conf. Ser.

Abstract. Copper-zinc ferrite (CuFe 2 O 4 ) films have been deposited successfully by spray pyrolysis technique. Ferrite films deposited of thickness (450 ± 15nm) at temperature (400 ± 10 o C) and annealing (600 o C) for range of (4h). The compound was doping with zinc at rates (x= 0,0.2,0.4). The crystalline structure of the prepared films was determined Tetragonal a spin Ferrite in peak (211), and when it was doping with zinc, it turned into cubic in peaks (311). The particle size was found to decrease by increasing the concentration of (Zn). The optical properties have been identified of films wavelengths of (300-900) nm, The results showed that the transmittance for all thin films increases as the wavelength increases then saturates at higher wavelengths .